单项选择题
A.boss B.knuckle C.skeg D.strut
The exhaust pipe must be gas tight throughout its entir...
单项选择题The exhaust pipe must be gas tight throughout its entire length otherwise（）.
A.bilge water may enter the exhaust pipe B.entry of air may cause vapor lock C.carbon monoxide may enter the interior of the vessel D.the joint gaskets may be blown
The connected joints of pipe，usually made of three join...
单项选择题The connected joints of pipe，usually made of three joints of pipe approximately 90 feet long，racked in the derrick when making a trip are called a（）.
A.string B.stand C.joint D.standpipe
The C02 flooding system is actuated by a sequence of st...
单项选择题The C02 flooding system is actuated by a sequence of steps which are（）.
A.break glass，pull valve，break glass，pull cylinder control B.sound evacuation alarm，pull handle C.open bypass valve，break glass，pull handle D.open stop valve，open control valve，trip alarm
